Auto focusing lens assembly

Abstract

Provided is an auto focusing lens assembly, including: a lens; a first base; a second base; and a pair of restoring structures. The first base is mounted to the second base and slidable in a direction parallel to an optical axis of the lens. The first base includes a first bottom plate and a first side arm. The second base includes a second bottom plate, and a second side arm. The first side arm includes: first and second plate bodies. Each restoring structure includes: a magnet assembly, a guiding structure provided between the first plate body and the second side arm, and an elastic member provided between the first side arm and the second side arm in the direction parallel to the optical axis. The auto focusing lens assembly provided by the present invention can achieve a compact structure, a miniaturization design and the like advantages.

What is claimed is: 
     
         1 . An auto focusing lens assembly, comprising:
 a lens;   a first base;   a second base; and   a pair of restoring structures,   wherein the lens is located in the first base, and the first base is mounted to the second base and slidable in a direction parallel to an optical axis of the lens; the first base comprises: a first bottom plate, and a first side arm extending from the first bottom plate while being bent and respectively located at two sides of the lens; the second base comprises a second bottom plate, and a second side arm extending from the second bottom plate while being bent and respectively located outside the first side arm; the first side arm comprises: a first plate body opposite to the second side arm, and a second plate body extending from an end of the first plate body facing away from the first bottom plate while being bent and located above the second side arm; one of the pair of restoring structures is provided at one of the two sides of the lens, and the other one of the pair of restoring structures is provided at the other one of the two sides of the lens; each restoring structure of the pair of restoring structures comprises: at least one magnet assembly provided between the second side arm and the second plate body, at least one guiding structure provided between the first plate body and the second side arm, and an elastic member provided between the first side arm and the second side arm in the direction parallel to the optical axis.   
     
     
         2 . The auto focusing lens assembly as described in  claim 1 , wherein a projection of the at least one magnet assembly in a direction perpendicular to the optical axis is located on the elastic member. 
     
     
         3 . The auto focusing lens assembly as described in  claim 1 , wherein the at least one guiding structure is located between the elastic member and the at least one magnet assembly in a direction perpendicular to the optical axis of the lens. 
     
     
         4 . The auto focusing lens assembly as described in  claim 1 , wherein the first side arm further comprises a third plate body extending from an end of the first plate body facing away from an object side of the lens in the direction of the optical axis; and the first plate body, the second plate body and the third plate body form a recess for receiving the second side arm. 
     
     
         5 . The auto focusing lens assembly as described in  claim 4 , wherein the second side arm comprises a first connecting portion connected to the second bottom plate, a second connecting portion spaced apart from and opposite to the first connecting portion, and a third connecting portion connected to a side of the first connecting portion facing away from the third plate body and a side of the second connecting portion facing away from the third plate body; and the elastic member comprises an end connected to the third plate body, and another end connected to the third connecting portion. 
     
     
         6 . The auto focusing lens assembly as described in  claim 1 , wherein the at least one magnet assembly comprises two magnet assemblies provided between the second side arm and the second plate body, and the two magnet assemblies are spaced apart from each other. 
     
     
         7 . The auto focusing lens assembly as described in  claim 6 , wherein each of the two magnet assemblies comprises: a first magnet located at a side of the second side arm facing towards the second plate body, and a second magnet directly opposite to the first magnet and provided at a side of the second plate body facing towards the second side arm. 
     
     
         8 . The auto focusing lens assembly as described in  claim 7 , wherein a first recess is provided at the side of the second side arm facing towards the second plate body, and the first magnet is embedded into the first recess; and a second recess is provided at the side of the second plate body facing towards the second side arm, and the second magnet is embedded into the second recess. 
     
     
         9 . The auto focusing lens assembly as described in  claim 1 , wherein the at least one guiding structure comprises two guiding structures provided between the second side arm and the first plate body, and the two guiding structures are spaced apart from each other. 
     
     
         10 . The auto focusing lens assembly as described in  claim 9 , wherein each of the two guiding structures comprises: a first guiding groove formed by recessing from a surface of the first plate body facing towards the second side arm in the direction of the optical axis, a bearing portion provided at a surface of the second side arm facing towards the first plate body and configured to form a guiding channel in cooperation with the first guiding groove, and a ball provided between the first guiding groove and the bearing portion. 
     
     
         11 . The auto focusing lens assembly as described in  claim 1 , further comprising a memory alloy wire for auto focusing of the lens, wherein the memory alloy wire comprises an end fixed to the first base, and another end fixed to the second base; and a projection of the elastic member in a direction perpendicular to the optical axis is located on the memory alloy line.